attrib.h (3550B)
1/* SPDX-License-Identifier: GPL-2.0-or-later */ 2/* 3 * attrib.h - Defines for attribute handling in NTFS Linux kernel driver. 4 * Part of the Linux-NTFS project. 5 * 6 * Copyright (c) 2001-2005 Anton Altaparmakov 7 * Copyright (c) 2002 Richard Russon 8 */ 9 10#ifndef _LINUX_NTFS_ATTRIB_H 11#define _LINUX_NTFS_ATTRIB_H 12 13#include "endian.h" 14#include "types.h" 15#include "layout.h" 16#include "inode.h" 17#include "runlist.h" 18#include "volume.h" 19 20/** 21 * ntfs_attr_search_ctx - used in attribute search functions 22 * @mrec: buffer containing mft record to search 23 * @attr: attribute record in @mrec where to begin/continue search 24 * @is_first: if true ntfs_attr_lookup() begins search with @attr, else after 25 * 26 * Structure must be initialized to zero before the first call to one of the 27 * attribute search functions. Initialize @mrec to point to the mft record to 28 * search, and @attr to point to the first attribute within @mrec (not necessary 29 * if calling the _first() functions), and set @is_first to 'true' (not necessary 30 * if calling the _first() functions). 31 * 32 * If @is_first is 'true', the search begins with @attr. If @is_first is 'false', 33 * the search begins after @attr. This is so that, after the first call to one 34 * of the search attribute functions, we can call the function again, without 35 * any modification of the search context, to automagically get the next 36 * matching attribute. 37 */ 38typedef struct { 39 MFT_RECORD *mrec; 40 ATTR_RECORD *attr; 41 bool is_first; 42 ntfs_inode *ntfs_ino; 43 ATTR_LIST_ENTRY *al_entry; 44 ntfs_inode *base_ntfs_ino; 45 MFT_RECORD *base_mrec; 46 ATTR_RECORD *base_attr; 47} ntfs_attr_search_ctx; 48 49extern int ntfs_map_runlist_nolock(ntfs_inode *ni, VCN vcn, 50 ntfs_attr_search_ctx *ctx); 51extern int ntfs_map_runlist(ntfs_inode *ni, VCN vcn); 52 53extern LCN ntfs_attr_vcn_to_lcn_nolock(ntfs_inode *ni, const VCN vcn, 54 const bool write_locked); 55 56extern runlist_element *ntfs_attr_find_vcn_nolock(ntfs_inode *ni, 57 const VCN vcn, ntfs_attr_search_ctx *ctx); 58 59int ntfs_attr_lookup(const ATTR_TYPE type, const ntfschar *name, 60 const u32 name_len, const IGNORE_CASE_BOOL ic, 61 const VCN lowest_vcn, const u8 *val, const u32 val_len, 62 ntfs_attr_search_ctx *ctx); 63 64extern int load_attribute_list(ntfs_volume *vol, runlist *rl, u8 *al_start, 65 const s64 size, const s64 initialized_size); 66 67static inline s64 ntfs_attr_size(const ATTR_RECORD *a) 68{ 69 if (!a->non_resident) 70 return (s64)le32_to_cpu(a->data.resident.value_length); 71 return sle64_to_cpu(a->data.non_resident.data_size); 72} 73 74extern void ntfs_attr_reinit_search_ctx(ntfs_attr_search_ctx *ctx); 75extern ntfs_attr_search_ctx *ntfs_attr_get_search_ctx(ntfs_inode *ni, 76 MFT_RECORD *mrec); 77extern void ntfs_attr_put_search_ctx(ntfs_attr_search_ctx *ctx); 78 79#ifdef NTFS_RW 80 81extern int ntfs_attr_size_bounds_check(const ntfs_volume *vol, 82 const ATTR_TYPE type, const s64 size); 83extern int ntfs_attr_can_be_non_resident(const ntfs_volume *vol, 84 const ATTR_TYPE type); 85extern int ntfs_attr_can_be_resident(const ntfs_volume *vol, 86 const ATTR_TYPE type); 87 88extern int ntfs_attr_record_resize(MFT_RECORD *m, ATTR_RECORD *a, u32 new_size); 89extern int ntfs_resident_attr_value_resize(MFT_RECORD *m, ATTR_RECORD *a, 90 const u32 new_size); 91 92extern int ntfs_attr_make_non_resident(ntfs_inode *ni, const u32 data_size); 93 94extern s64 ntfs_attr_extend_allocation(ntfs_inode *ni, s64 new_alloc_size, 95 const s64 new_data_size, const s64 data_start); 96 97extern int ntfs_attr_set(ntfs_inode *ni, const s64 ofs, const s64 cnt, 98 const u8 val); 99 100#endif /* NTFS_RW */ 101 102#endif /* _LINUX_NTFS_ATTRIB_H */